Method for predicting hot-rolling Nb-containing band steel organization and mechanical properties

Abstract

The present invention relates to a method for predicting hot-rolled Nb-contained band steel tissue and mechanical performance. Said method is characterized by that it uses physical metallurgical model as basis, adopts a method of making thermal simulation experiment be combined with industrial production actually-measured data analysis, creates mathematical models for hot-rolled Nb-contained band steel tissue and mechanical performance, including temperature model, austenite recrystallization model on the hot-rolling line, phase change model in cooling process and tissue and performance relationship model and selects VB language to originate predictive software for hot-rolled Nb-contained band steel tissue and mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for predicting the microstructure and mechanical properties of hot-rolled Nb-containing strip steel. Background technique [0002] With the intensification of competition in the steel product market, users are increasingly demanding on product prices and quality, which requires steel manufacturers to continuously improve product quality and reduce production costs. For this purpose, for the steel processing system, the best composition and process can be determined through on-site repeated trial production. But this requires a lot of manpower and financial resources, and because the experimental process lacks corresponding theoretical guidance, it usually takes a long time. In recent years, with the development of computer, physical metallurgy, and rolling technology, on the basis of physical metallurgical principles and a large number of experiments, ...

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Problems solved by technology

[0005] Although many scientific research institutions and researchers have made a lot of exploration and efforts in building physical metallurgical models in the hot rolling process and developing tissue performance prediction systems, the results are still not optimistic, and there are still many problems, mainly in the following aspects: : (1) The existing performance prediction system for C-Mn steel can meet the requirements of less inspection or even no inspection, but for micro-alloy steel, it is still difficult to achieve accurate prediction; (2) In the case of Nb-containing strip steel In terms of microstructure performance prediction, domestic and foreign literature has reported some related sub-model research, but there is no report on the comprehensive prediction of microstructure evolution and mechanical properties in the production process of Nb-containing strip steel; (3) The cost of imported software is high

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